Quote:
Originally Posted by Duotone
The steering wheel controls are just normally open switches.
All the changes in voltage are done in the head unit.
This is the diagram for the Harmony but the wheel controls are all the same.
Dave T |
That diagram is rather simplified, and wouldn't work as it appears. Each switch must set up a different resistance, so that the head unit can tell which one has been operated. They are quite reliable, however if not used regularly, the switches can get dirty, which upsets the calibrated resistance and results in the switches having random effects.
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